JPH0322121A - Keyboard - Google Patents

Abstract

PURPOSE:To eliminate the need for covering a specified key by preventing the key code of the set specified key from being transferred to an external device. CONSTITUTION:A key code setting part 5 which is constituted of a DIP switch and can set plural key codes for invalidating the input of the specified key and a key code transfer control circuit 4 which transfers the key code to the external device through an external interface part 3 only when the key code outputted from a key input control part 2 is not set at the key code setting part 5 are added to a traditional keyboard. Thus, when the key code of an interruption key is set previously in the key code setting part 5, even if the interruption key is depressed erroneously during the processing of a large quantity of data at the keyboard, the key code of it is not transferred to the external device, and it is unnecessary to execute the processing again from beginning, and the specified key need not be covered.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a keyboard.

(Prior Art) In a conventional keyboard, as shown in FIG.
When any key in the key matrix unit 1 is pressed, the key code corresponding to the pressed key is transferred to the external device via the external interface unit 3.

[Problem to be solved by the invention]

The above-mentioned conventional keyboard transfers all the key codes corresponding to the keys pressed in the key matrix section 1 to the external device via the external interface section 3, so it is difficult to perform tasks that require processing time with large amounts of data, for example. The disadvantage is that if you accidentally press the interrupt key while the machine is running, you will have to start the process again from the beginning.

Although it is possible to attach a cover to the interrupt key to prevent it from being pressed by mistake, the attachment/removal of the cover is complicated and the cover may be lost.

An object of the present invention is to provide a keyboard that does not transfer the key code to an external device via an external interface unit when a specific key is pressed.

[Means to solve the problem]

The keyboard of the present invention includes a key code setting section in which a key code of a specific key is set, and a key code that is transmitted through an external interface section only when the key code of a pressed key is not set in the key code setting section. and a key code transfer control circuit for transferring the key code to an external device.

(Function) Therefore, if you set the key code of the interrupt key in the key code setting section, even if you accidentally press the interrupt key while processing a large amount of data on the keyboard, the data will be transferred to the external device via the external interface section. Not done. It goes without saying that any desired key other than the interrupt key can be set in the key code setting section.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the keyboard of the present invention.

This keyboard is the same as the conventional keyboard shown in FIG. 2, but also includes a key code setting section 5, which is composed of a DIP switch and can set a plurality of key codes for disabling the input of a specific key, and a key code setting section 5 that is output from the key manual control section 2. A key code transfer control circuit 4 is additionally configured to transfer the key code to an external device (not shown) via the external interface unit 3 only when the key code is not set in the key code setting unit 5. There is.

Therefore, if the key code of the interrupt key is set in the key code setting section 5, even if the interrupt key is pressed by mistake while processing a large amount of data on the keyboard, the key code will not be transferred to the external device and processing will continue. There is no need to start from the beginning again.

Note that when a disabled key is to be enabled, the value of the dip switch in the key code setting section 5 in which the key is registered is set to a code that is not included in the input key code, for example, all 0's.

〔Effect of the invention〕

As explained above, the present invention does not transfer the set key code of a specific key to an external device, so there is no need to cover the specific key, and it is possible to set an invalid key for each key. This has the effect that processing will not be interrupted even if the interrupt key is pressed by mistake during data processing in an information processing device or the like that is equipped with a function to interrupt processing from the keyboard.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the keyboard of the present invention;
FIG. 2 is a block diagram of a conventional keyboard. 1 ------- Key matrix section, 2 -------
-key manual control section, 3...external interface section, 4 ------
-Key code transfer control circuit, 5 ------- key code setting section.

Claims (1)

[Claims] 1. The keyboard includes a key code setting section in which a key code of a specific key is set, and the key code is set only when the key code of the pressed key is not set in the key code setting section. A keyboard comprising: a key code transfer control circuit that transfers a key code to an external device via an external interface section.